What is the Equivalent of 1 joule in calorie?

Answer: The correct answer is A. 0.24 calories.

Energy can be measured in different units, with joules (J) and calories (cal) being two commonly used units in physics and chemistry. The relationship between joules and calories is defined as: 1 joule = 0.239 calories (approximately 0.24 calories)

Complete Answer:

This conversion factor is based on the definition of a calorie, which is the amount of heat energy needed to raise the temperature of 1 gram of water by 1 degree Celsius.

To reinforce the concept, let’s consider a simple example:

Suppose you have 10 joules of energy. To convert this to calories:

Energy (cal) = Energy (J) × Conversion Factor
Energy (cal) = 10 × 0.24
Energy (cal) = 2.4 calories

Thus, 10 joules of energy is approximately 2.4 calories.

Importance of Joule to Calorie Conversion

Understanding this conversion is essential for:

• Physics and Chemistry Applications: It helps in solving thermodynamics problems, especially when dealing with heat energy.
• Food and Nutrition: The energy content of food is often measured in kilocalories (kcal), which are 1,000 times a calorie. Converting between joules and calories is useful in diet planning.
• Engineering and Power Calculations: Many engineering fields use joules to measure energy efficiency and heat dissipation.

The joule (J) is the SI unit of energy, while calorie (cal) is a non-SI unit still widely used in thermodynamics and nutrition.

1 kilocalorie (kcal) = 1,000 calories = 4,184 joules.

When dealing with large amounts of energy, kilojoules (kJ) and kilocalories (kcal) are often used instead of joules and calorie

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